Fog Node

Description

Provides access to the Scene's Fog parameters.

Ports

Name	Direction	Type	Binding	Description
Color	Output	Vector 4	None	Fog color
Density	Output	Vector 1	None	Fog density at the vertex or fragment's clip space depth

Shader Function

Generated Code Example

The following example code represents one possible outcome of this node.

float3 ObjectSpacePosition = IN.ObjectSpacePosition;

void Unity_Fog_float(float3 ObjectSpacePosition, out float4 Color, out float Density)
{
    Color = unity_FogColor;
    float clipZ_01 = UNITY_Z_0_FAR_FROM_CLIPSPACE(mul(GetWorldToHClipMatrix(), mul(GetObjectToWorldMatrix(), ObjectSpacePosition)).z);
    #if defined(FOG_LINEAR)
        float fogFactor = saturate(clipZ_01 * unity_FogParams.z + unity_FogParams.w);
        Density = fogFactor;
    #elif defined(FOG_EXP)
        float fogFactor = unity_FogParams.y * clipZ_01;
        Density = saturate(exp2(-fogFactor));
    #elif defined(FOG_EXP2)
        float fogFactor = unity_FogParams.x * clipZ_01;
        Density = saturate(exp2(-fogFactor*fogFactor));
    #else
        Density = 0.0h;
    #endif
}